When developing hydrocarbon deposits, an important task is the development and implementation of energy- and resource-saving technologies. Prospects for the development of Gazprom dobycha Urengoy are associated with the commissioning of deposits of the Achimov stratum. For the preparation of gas from these deposits, the design solutions include the use of low-temperature separation units with a recirculation scheme for the use of methanol. The article describes the development and implementation of technical solutions on improvement of recirculation schemes of the use of methanol in the Achimov gas fields. The design solutions on optimization of methanol consumption at the gas treatment plant of the area 2A of the Urengoy field were not fully realized because of the hydrate deposition when feeding liquid from the intermediate separation stage to the low-temperature stage. The analysis of methanol distribution between the outgoing streams of the complex gas treatment plant showed that the main methanol losses occur with unstable condensate. Specialists of Gazprom dobycha Urengoy LLC developed two technical solutions aimed at reducing methanol consumption. The first solution involves feeding the liquid phase from the intermediate separation stage to the low-temperature stage by means of an ejector. The second solution is based on the aqueous extraction of the reagent from the condensate with a mixture of formation water and the aqueous phase after methanol utilization in the stripping column. The implementation of these technical solutions makes it possible to reduce methanol consumption in gas treatment plants by about twice. A list of activities on improving the recirculation technology of the use of methanol in Achimov gas treatment plants has been determined. The first technical solution has already been implemented in the gas treatment plant of the area 2A and has proved its effectiveness

The problem of intercepting a target moving along a prescribed trajectory by a Dubins car is stated and formalized as a time-optimal control problem with an arbitrary car velocity direction at the interception. The conditions available in the literature under which the optimal trajectory is a geodesic line drawn from the initial position of the car to the interception point are refined. Algebraic equations for calculating the optimal interception time are obtained. The optimal control is synthesized based on these equations. A software module is developed for constructing the optimal car trajectories for various target trajectories.

In the article, the approach of integrated statistical control and diagnostics of the radio-electronic equipment, which is based on the analysis, integration of the measuring information arriving from the thermal imager, magnetic field sensors, tension and humidity of air and also statistical control of equipment parameters, is presented. The solution of a control and diagnostics problem is based on monitoring of changes in the average level of a multi-parameter process. Here, Hotelling control charts, integration and processing of the measured information are used to provide the analysis and decision-making on the influence of the operator. The algorithm implements a technique of integrated statistical control of the technical condition of the radio-electronic equipment and is capable to determine the level of its precritical condition. The proposed technique increases the reliability of the identification of technical conditions of radio-electronic equipment and expands the scope of technical means of control and diagnostics [https://www.epj-conferences.org/articles/epjconf/pdf/2021/02/epjconf_mnps2021_02004.pdf].

The paper considers the Network Time Protocol (NTP) algorithm. Mathematical model of an NTP-based unified time scale maintenance system is analyzed in depth. An implementation of an auxiliary model of I&C system based on "Network Calculus" techniques is proposed. Some practical aspects of time synchronization over the NTP Protocol in virtual environments are described.